1995

0.0

2010

7.8

2008

6.1

1995

4.6

2012

7.6

1989

6.0

2009

5.3

2007

5.8

2013

4.0

1990

7.4

2001

7.6

1999

7.9

1994

0.0

2011

8.1

2004

7.7

1998

7.4

1996

7.0

2006

8.5

2005

5.1

2000

3.0

2010

6.1